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qemu-e2k/target-i386/cpu.h
Eduardo Habkost 1352672860 Expose CPUID leaf 7 only for -cpu host 
Changes v2 -> v3;
  - Check for kvm_enabled() before setting cpuid_7_0_ebx_features

Changes v1 -> v2:
  - Use kvm_arch_get_supported_cpuid() instead of host_cpuid() on
    cpu_x86_fill_host().

  We should use GET_SUPPORTED_CPUID for all bits on "-cpu host"
  eventually, but I am not changing all the other CPUID leaves because
  we may not be able to test such an intrusive change in time for 1.1.

Description of the bug:

Since QEMU 0.15, the CPUID information on CPUID[EAX=7,ECX=0] is being
returned unfiltered to the guest, directly from the GET_SUPPORTED_CPUID
return value.

The problem is that this makes the resulting CPU feature flags
unpredictable and dependent on the host CPU and kernel version. This
breaks live-migration badly if migrating from a host CPU that supports
some features on that CPUID leaf (running a recent kernel) to a kernel
or host CPU that doesn't support it.

Migration also is incorrect (the virtual CPU changes under the guest's
feet) if you migrate in the opposite direction (from an old CPU/kernel
to a new CPU/kernel), but with less serious consequences (guests
normally query CPUID information only once on boot).

Fortunately, the bug affects only users using cpudefs with level >= 7.

The right behavior should be to explicitly enable those features on
[cpudef] config sections or on the "-cpu" command-line arguments. Right
now there is no predefined CPU model on QEMU that has those features:
the latest Intel model we have is Sandy Bridge.

I would like to get this fixed on 1.1, so I am submitting this patch,
that enables those features only if "-cpu host" is being used (as we
don't have any pre-defined CPU model that actually have those features).
After 1.1 is released, we can make those features properly configurable
on [cpudef] and -cpu configuration.

One problem is: with this patch, users with the following setup:
- Running QEMU 1.0;
- Using a cpudef having level >= 7;
- Running a kernel that supports the features on CPUID leaf 7; and
- Running on a CPU that supports some features on CPUID leaf 7
won't be able to live-migrate to QEMU 1.1. But for these users
live-migration is already broken (they can't live-migrate to hosts with
older CPUs or older kernels, already), I don't see how to avoid this
problem.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-05-30 10:28:44 +08:00

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/*
* i386 virtual CPU header
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CPU_I386_H
#define CPU_I386_H
#include "config.h"
#include "qemu-common.h"
#ifdef TARGET_X86_64
#define TARGET_LONG_BITS 64
#else
#define TARGET_LONG_BITS 32
#endif
/* target supports implicit self modifying code */
#define TARGET_HAS_SMC
/* support for self modifying code even if the modified instruction is
close to the modifying instruction */
#define TARGET_HAS_PRECISE_SMC
#define TARGET_HAS_ICE 1
#ifdef TARGET_X86_64
#define ELF_MACHINE EM_X86_64
#else
#define ELF_MACHINE EM_386
#endif
#define CPUArchState struct CPUX86State
#include "cpu-defs.h"
#include "softfloat.h"
#define R_EAX 0
#define R_ECX 1
#define R_EDX 2
#define R_EBX 3
#define R_ESP 4
#define R_EBP 5
#define R_ESI 6
#define R_EDI 7
#define R_AL 0
#define R_CL 1
#define R_DL 2
#define R_BL 3
#define R_AH 4
#define R_CH 5
#define R_DH 6
#define R_BH 7
#define R_ES 0
#define R_CS 1
#define R_SS 2
#define R_DS 3
#define R_FS 4
#define R_GS 5
/* segment descriptor fields */
#define DESC_G_MASK (1 << 23)
#define DESC_B_SHIFT 22
#define DESC_B_MASK (1 << DESC_B_SHIFT)
#define DESC_L_SHIFT 21 /* x86_64 only : 64 bit code segment */
#define DESC_L_MASK (1 << DESC_L_SHIFT)
#define DESC_AVL_MASK (1 << 20)
#define DESC_P_MASK (1 << 15)
#define DESC_DPL_SHIFT 13
#define DESC_DPL_MASK (3 << DESC_DPL_SHIFT)
#define DESC_S_MASK (1 << 12)
#define DESC_TYPE_SHIFT 8
#define DESC_TYPE_MASK (15 << DESC_TYPE_SHIFT)
#define DESC_A_MASK (1 << 8)
#define DESC_CS_MASK (1 << 11) /* 1=code segment 0=data segment */
#define DESC_C_MASK (1 << 10) /* code: conforming */
#define DESC_R_MASK (1 << 9) /* code: readable */
#define DESC_E_MASK (1 << 10) /* data: expansion direction */
#define DESC_W_MASK (1 << 9) /* data: writable */
#define DESC_TSS_BUSY_MASK (1 << 9)
/* eflags masks */
#define CC_C 0x0001
#define CC_P 0x0004
#define CC_A 0x0010
#define CC_Z 0x0040
#define CC_S 0x0080
#define CC_O 0x0800
#define TF_SHIFT 8
#define IOPL_SHIFT 12
#define VM_SHIFT 17
#define TF_MASK 0x00000100
#define IF_MASK 0x00000200
#define DF_MASK 0x00000400
#define IOPL_MASK 0x00003000
#define NT_MASK 0x00004000
#define RF_MASK 0x00010000
#define VM_MASK 0x00020000
#define AC_MASK 0x00040000
#define VIF_MASK 0x00080000
#define VIP_MASK 0x00100000
#define ID_MASK 0x00200000
/* hidden flags - used internally by qemu to represent additional cpu
states. Only the CPL, INHIBIT_IRQ, SMM and SVMI are not
redundant. We avoid using the IOPL_MASK, TF_MASK and VM_MASK bit
position to ease oring with eflags. */
/* current cpl */
#define HF_CPL_SHIFT 0
/* true if soft mmu is being used */
#define HF_SOFTMMU_SHIFT 2
/* true if hardware interrupts must be disabled for next instruction */
#define HF_INHIBIT_IRQ_SHIFT 3
/* 16 or 32 segments */
#define HF_CS32_SHIFT 4
#define HF_SS32_SHIFT 5
/* zero base for DS, ES and SS : can be '0' only in 32 bit CS segment */
#define HF_ADDSEG_SHIFT 6
/* copy of CR0.PE (protected mode) */
#define HF_PE_SHIFT 7
#define HF_TF_SHIFT 8 /* must be same as eflags */
#define HF_MP_SHIFT 9 /* the order must be MP, EM, TS */
#define HF_EM_SHIFT 10
#define HF_TS_SHIFT 11
#define HF_IOPL_SHIFT 12 /* must be same as eflags */
#define HF_LMA_SHIFT 14 /* only used on x86_64: long mode active */
#define HF_CS64_SHIFT 15 /* only used on x86_64: 64 bit code segment */
#define HF_RF_SHIFT 16 /* must be same as eflags */
#define HF_VM_SHIFT 17 /* must be same as eflags */
#define HF_SMM_SHIFT 19 /* CPU in SMM mode */
#define HF_SVME_SHIFT 20 /* SVME enabled (copy of EFER.SVME) */
#define HF_SVMI_SHIFT 21 /* SVM intercepts are active */
#define HF_OSFXSR_SHIFT 22 /* CR4.OSFXSR */
#define HF_CPL_MASK (3 << HF_CPL_SHIFT)
#define HF_SOFTMMU_MASK (1 << HF_SOFTMMU_SHIFT)
#define HF_INHIBIT_IRQ_MASK (1 << HF_INHIBIT_IRQ_SHIFT)
#define HF_CS32_MASK (1 << HF_CS32_SHIFT)
#define HF_SS32_MASK (1 << HF_SS32_SHIFT)
#define HF_ADDSEG_MASK (1 << HF_ADDSEG_SHIFT)
#define HF_PE_MASK (1 << HF_PE_SHIFT)
#define HF_TF_MASK (1 << HF_TF_SHIFT)
#define HF_MP_MASK (1 << HF_MP_SHIFT)
#define HF_EM_MASK (1 << HF_EM_SHIFT)
#define HF_TS_MASK (1 << HF_TS_SHIFT)
#define HF_IOPL_MASK (3 << HF_IOPL_SHIFT)
#define HF_LMA_MASK (1 << HF_LMA_SHIFT)
#define HF_CS64_MASK (1 << HF_CS64_SHIFT)
#define HF_RF_MASK (1 << HF_RF_SHIFT)
#define HF_VM_MASK (1 << HF_VM_SHIFT)
#define HF_SMM_MASK (1 << HF_SMM_SHIFT)
#define HF_SVME_MASK (1 << HF_SVME_SHIFT)
#define HF_SVMI_MASK (1 << HF_SVMI_SHIFT)
#define HF_OSFXSR_MASK (1 << HF_OSFXSR_SHIFT)
/* hflags2 */
#define HF2_GIF_SHIFT 0 /* if set CPU takes interrupts */
#define HF2_HIF_SHIFT 1 /* value of IF_MASK when entering SVM */
#define HF2_NMI_SHIFT 2 /* CPU serving NMI */
#define HF2_VINTR_SHIFT 3 /* value of V_INTR_MASKING bit */
#define HF2_GIF_MASK (1 << HF2_GIF_SHIFT)
#define HF2_HIF_MASK (1 << HF2_HIF_SHIFT)
#define HF2_NMI_MASK (1 << HF2_NMI_SHIFT)
#define HF2_VINTR_MASK (1 << HF2_VINTR_SHIFT)
#define CR0_PE_SHIFT 0
#define CR0_MP_SHIFT 1
#define CR0_PE_MASK (1 << 0)
#define CR0_MP_MASK (1 << 1)
#define CR0_EM_MASK (1 << 2)
#define CR0_TS_MASK (1 << 3)
#define CR0_ET_MASK (1 << 4)
#define CR0_NE_MASK (1 << 5)
#define CR0_WP_MASK (1 << 16)
#define CR0_AM_MASK (1 << 18)
#define CR0_PG_MASK (1 << 31)
#define CR4_VME_MASK (1 << 0)
#define CR4_PVI_MASK (1 << 1)
#define CR4_TSD_MASK (1 << 2)
#define CR4_DE_MASK (1 << 3)
#define CR4_PSE_MASK (1 << 4)
#define CR4_PAE_MASK (1 << 5)
#define CR4_MCE_MASK (1 << 6)
#define CR4_PGE_MASK (1 << 7)
#define CR4_PCE_MASK (1 << 8)
#define CR4_OSFXSR_SHIFT 9
#define CR4_OSFXSR_MASK (1 << CR4_OSFXSR_SHIFT)
#define CR4_OSXMMEXCPT_MASK (1 << 10)
#define DR6_BD (1 << 13)
#define DR6_BS (1 << 14)
#define DR6_BT (1 << 15)
#define DR6_FIXED_1 0xffff0ff0
#define DR7_GD (1 << 13)
#define DR7_TYPE_SHIFT 16
#define DR7_LEN_SHIFT 18
#define DR7_FIXED_1 0x00000400
#define PG_PRESENT_BIT 0
#define PG_RW_BIT 1
#define PG_USER_BIT 2
#define PG_PWT_BIT 3
#define PG_PCD_BIT 4
#define PG_ACCESSED_BIT 5
#define PG_DIRTY_BIT 6
#define PG_PSE_BIT 7
#define PG_GLOBAL_BIT 8
#define PG_NX_BIT 63
#define PG_PRESENT_MASK (1 << PG_PRESENT_BIT)
#define PG_RW_MASK (1 << PG_RW_BIT)
#define PG_USER_MASK (1 << PG_USER_BIT)
#define PG_PWT_MASK (1 << PG_PWT_BIT)
#define PG_PCD_MASK (1 << PG_PCD_BIT)
#define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)
#define PG_DIRTY_MASK (1 << PG_DIRTY_BIT)
#define PG_PSE_MASK (1 << PG_PSE_BIT)
#define PG_GLOBAL_MASK (1 << PG_GLOBAL_BIT)
#define PG_HI_USER_MASK 0x7ff0000000000000LL
#define PG_NX_MASK (1LL << PG_NX_BIT)
#define PG_ERROR_W_BIT 1
#define PG_ERROR_P_MASK 0x01
#define PG_ERROR_W_MASK (1 << PG_ERROR_W_BIT)
#define PG_ERROR_U_MASK 0x04
#define PG_ERROR_RSVD_MASK 0x08
#define PG_ERROR_I_D_MASK 0x10
#define MCG_CTL_P (1ULL<<8) /* MCG_CAP register available */
#define MCG_SER_P (1ULL<<24) /* MCA recovery/new status bits */
#define MCE_CAP_DEF (MCG_CTL_P|MCG_SER_P)
#define MCE_BANKS_DEF 10
#define MCG_STATUS_RIPV (1ULL<<0) /* restart ip valid */
#define MCG_STATUS_EIPV (1ULL<<1) /* ip points to correct instruction */
#define MCG_STATUS_MCIP (1ULL<<2) /* machine check in progress */
#define MCI_STATUS_VAL (1ULL<<63) /* valid error */
#define MCI_STATUS_OVER (1ULL<<62) /* previous errors lost */
#define MCI_STATUS_UC (1ULL<<61) /* uncorrected error */
#define MCI_STATUS_EN (1ULL<<60) /* error enabled */
#define MCI_STATUS_MISCV (1ULL<<59) /* misc error reg. valid */
#define MCI_STATUS_ADDRV (1ULL<<58) /* addr reg. valid */
#define MCI_STATUS_PCC (1ULL<<57) /* processor context corrupt */
#define MCI_STATUS_S (1ULL<<56) /* Signaled machine check */
#define MCI_STATUS_AR (1ULL<<55) /* Action required */
/* MISC register defines */
#define MCM_ADDR_SEGOFF 0 /* segment offset */
#define MCM_ADDR_LINEAR 1 /* linear address */
#define MCM_ADDR_PHYS 2 /* physical address */
#define MCM_ADDR_MEM 3 /* memory address */
#define MCM_ADDR_GENERIC 7 /* generic */
#define MSR_IA32_TSC 0x10
#define MSR_IA32_APICBASE 0x1b
#define MSR_IA32_APICBASE_BSP (1<<8)
#define MSR_IA32_APICBASE_ENABLE (1<<11)
#define MSR_IA32_APICBASE_BASE (0xfffff<<12)
#define MSR_IA32_TSCDEADLINE 0x6e0
#define MSR_MTRRcap 0xfe
#define MSR_MTRRcap_VCNT 8
#define MSR_MTRRcap_FIXRANGE_SUPPORT (1 << 8)
#define MSR_MTRRcap_WC_SUPPORTED (1 << 10)
#define MSR_IA32_SYSENTER_CS 0x174
#define MSR_IA32_SYSENTER_ESP 0x175
#define MSR_IA32_SYSENTER_EIP 0x176
#define MSR_MCG_CAP 0x179
#define MSR_MCG_STATUS 0x17a
#define MSR_MCG_CTL 0x17b
#define MSR_IA32_PERF_STATUS 0x198
#define MSR_IA32_MISC_ENABLE 0x1a0
/* Indicates good rep/movs microcode on some processors: */
#define MSR_IA32_MISC_ENABLE_DEFAULT 1
#define MSR_MTRRphysBase(reg) (0x200 + 2 * (reg))
#define MSR_MTRRphysMask(reg) (0x200 + 2 * (reg) + 1)
#define MSR_MTRRfix64K_00000 0x250
#define MSR_MTRRfix16K_80000 0x258
#define MSR_MTRRfix16K_A0000 0x259
#define MSR_MTRRfix4K_C0000 0x268
#define MSR_MTRRfix4K_C8000 0x269
#define MSR_MTRRfix4K_D0000 0x26a
#define MSR_MTRRfix4K_D8000 0x26b
#define MSR_MTRRfix4K_E0000 0x26c
#define MSR_MTRRfix4K_E8000 0x26d
#define MSR_MTRRfix4K_F0000 0x26e
#define MSR_MTRRfix4K_F8000 0x26f
#define MSR_PAT 0x277
#define MSR_MTRRdefType 0x2ff
#define MSR_MC0_CTL 0x400
#define MSR_MC0_STATUS 0x401
#define MSR_MC0_ADDR 0x402
#define MSR_MC0_MISC 0x403
#define MSR_EFER 0xc0000080
#define MSR_EFER_SCE (1 << 0)
#define MSR_EFER_LME (1 << 8)
#define MSR_EFER_LMA (1 << 10)
#define MSR_EFER_NXE (1 << 11)
#define MSR_EFER_SVME (1 << 12)
#define MSR_EFER_FFXSR (1 << 14)
#define MSR_STAR 0xc0000081
#define MSR_LSTAR 0xc0000082
#define MSR_CSTAR 0xc0000083
#define MSR_FMASK 0xc0000084
#define MSR_FSBASE 0xc0000100
#define MSR_GSBASE 0xc0000101
#define MSR_KERNELGSBASE 0xc0000102
#define MSR_TSC_AUX 0xc0000103
#define MSR_VM_HSAVE_PA 0xc0010117
/* cpuid_features bits */
#define CPUID_FP87 (1 << 0)
#define CPUID_VME (1 << 1)
#define CPUID_DE (1 << 2)
#define CPUID_PSE (1 << 3)
#define CPUID_TSC (1 << 4)
#define CPUID_MSR (1 << 5)
#define CPUID_PAE (1 << 6)
#define CPUID_MCE (1 << 7)
#define CPUID_CX8 (1 << 8)
#define CPUID_APIC (1 << 9)
#define CPUID_SEP (1 << 11) /* sysenter/sysexit */
#define CPUID_MTRR (1 << 12)
#define CPUID_PGE (1 << 13)
#define CPUID_MCA (1 << 14)
#define CPUID_CMOV (1 << 15)
#define CPUID_PAT (1 << 16)
#define CPUID_PSE36 (1 << 17)
#define CPUID_PN (1 << 18)
#define CPUID_CLFLUSH (1 << 19)
#define CPUID_DTS (1 << 21)
#define CPUID_ACPI (1 << 22)
#define CPUID_MMX (1 << 23)
#define CPUID_FXSR (1 << 24)
#define CPUID_SSE (1 << 25)
#define CPUID_SSE2 (1 << 26)
#define CPUID_SS (1 << 27)
#define CPUID_HT (1 << 28)
#define CPUID_TM (1 << 29)
#define CPUID_IA64 (1 << 30)
#define CPUID_PBE (1 << 31)
#define CPUID_EXT_SSE3 (1 << 0)
#define CPUID_EXT_DTES64 (1 << 2)
#define CPUID_EXT_MONITOR (1 << 3)
#define CPUID_EXT_DSCPL (1 << 4)
#define CPUID_EXT_VMX (1 << 5)
#define CPUID_EXT_SMX (1 << 6)
#define CPUID_EXT_EST (1 << 7)
#define CPUID_EXT_TM2 (1 << 8)
#define CPUID_EXT_SSSE3 (1 << 9)
#define CPUID_EXT_CID (1 << 10)
#define CPUID_EXT_CX16 (1 << 13)
#define CPUID_EXT_XTPR (1 << 14)
#define CPUID_EXT_PDCM (1 << 15)
#define CPUID_EXT_DCA (1 << 18)
#define CPUID_EXT_SSE41 (1 << 19)
#define CPUID_EXT_SSE42 (1 << 20)
#define CPUID_EXT_X2APIC (1 << 21)
#define CPUID_EXT_MOVBE (1 << 22)
#define CPUID_EXT_POPCNT (1 << 23)
#define CPUID_EXT_XSAVE (1 << 26)
#define CPUID_EXT_OSXSAVE (1 << 27)
#define CPUID_EXT_HYPERVISOR (1 << 31)
#define CPUID_EXT2_SYSCALL (1 << 11)
#define CPUID_EXT2_MP (1 << 19)
#define CPUID_EXT2_NX (1 << 20)
#define CPUID_EXT2_MMXEXT (1 << 22)
#define CPUID_EXT2_FFXSR (1 << 25)
#define CPUID_EXT2_PDPE1GB (1 << 26)
#define CPUID_EXT2_RDTSCP (1 << 27)
#define CPUID_EXT2_LM (1 << 29)
#define CPUID_EXT2_3DNOWEXT (1 << 30)
#define CPUID_EXT2_3DNOW (1 << 31)
#define CPUID_EXT3_LAHF_LM (1 << 0)
#define CPUID_EXT3_CMP_LEG (1 << 1)
#define CPUID_EXT3_SVM (1 << 2)
#define CPUID_EXT3_EXTAPIC (1 << 3)
#define CPUID_EXT3_CR8LEG (1 << 4)
#define CPUID_EXT3_ABM (1 << 5)
#define CPUID_EXT3_SSE4A (1 << 6)
#define CPUID_EXT3_MISALIGNSSE (1 << 7)
#define CPUID_EXT3_3DNOWPREFETCH (1 << 8)
#define CPUID_EXT3_OSVW (1 << 9)
#define CPUID_EXT3_IBS (1 << 10)
#define CPUID_EXT3_SKINIT (1 << 12)
#define CPUID_SVM_NPT (1 << 0)
#define CPUID_SVM_LBRV (1 << 1)
#define CPUID_SVM_SVMLOCK (1 << 2)
#define CPUID_SVM_NRIPSAVE (1 << 3)
#define CPUID_SVM_TSCSCALE (1 << 4)
#define CPUID_SVM_VMCBCLEAN (1 << 5)
#define CPUID_SVM_FLUSHASID (1 << 6)
#define CPUID_SVM_DECODEASSIST (1 << 7)
#define CPUID_SVM_PAUSEFILTER (1 << 10)
#define CPUID_SVM_PFTHRESHOLD (1 << 12)
#define CPUID_VENDOR_INTEL_1 0x756e6547 /* "Genu" */
#define CPUID_VENDOR_INTEL_2 0x49656e69 /* "ineI" */
#define CPUID_VENDOR_INTEL_3 0x6c65746e /* "ntel" */
#define CPUID_VENDOR_AMD_1 0x68747541 /* "Auth" */
#define CPUID_VENDOR_AMD_2 0x69746e65 /* "enti" */
#define CPUID_VENDOR_AMD_3 0x444d4163 /* "cAMD" */
#define CPUID_VENDOR_VIA_1 0x746e6543 /* "Cent" */
#define CPUID_VENDOR_VIA_2 0x48727561 /* "aurH" */
#define CPUID_VENDOR_VIA_3 0x736c7561 /* "auls" */
#define CPUID_MWAIT_IBE (1 << 1) /* Interrupts can exit capability */
#define CPUID_MWAIT_EMX (1 << 0) /* enumeration supported */
#define EXCP00_DIVZ 0
#define EXCP01_DB 1
#define EXCP02_NMI 2
#define EXCP03_INT3 3
#define EXCP04_INTO 4
#define EXCP05_BOUND 5
#define EXCP06_ILLOP 6
#define EXCP07_PREX 7
#define EXCP08_DBLE 8
#define EXCP09_XERR 9
#define EXCP0A_TSS 10
#define EXCP0B_NOSEG 11
#define EXCP0C_STACK 12
#define EXCP0D_GPF 13
#define EXCP0E_PAGE 14
#define EXCP10_COPR 16
#define EXCP11_ALGN 17
#define EXCP12_MCHK 18
#define EXCP_SYSCALL 0x100 /* only happens in user only emulation
for syscall instruction */
/* i386-specific interrupt pending bits. */
#define CPU_INTERRUPT_SMI CPU_INTERRUPT_TGT_EXT_2
#define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3
#define CPU_INTERRUPT_MCE CPU_INTERRUPT_TGT_EXT_4
#define CPU_INTERRUPT_VIRQ CPU_INTERRUPT_TGT_INT_0
#define CPU_INTERRUPT_INIT CPU_INTERRUPT_TGT_INT_1
#define CPU_INTERRUPT_SIPI CPU_INTERRUPT_TGT_INT_2
#define CPU_INTERRUPT_TPR CPU_INTERRUPT_TGT_INT_3
enum {
CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
CC_OP_EFLAGS, /* all cc are explicitly computed, CC_SRC = flags */
CC_OP_MULB, /* modify all flags, C, O = (CC_SRC != 0) */
CC_OP_MULW,
CC_OP_MULL,
CC_OP_MULQ,
CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_ADDW,
CC_OP_ADDL,
CC_OP_ADDQ,
CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_ADCW,
CC_OP_ADCL,
CC_OP_ADCQ,
CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_SUBW,
CC_OP_SUBL,
CC_OP_SUBQ,
CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_SBBW,
CC_OP_SBBL,
CC_OP_SBBQ,
CC_OP_LOGICB, /* modify all flags, CC_DST = res */
CC_OP_LOGICW,
CC_OP_LOGICL,
CC_OP_LOGICQ,
CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
CC_OP_INCW,
CC_OP_INCL,
CC_OP_INCQ,
CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C */
CC_OP_DECW,
CC_OP_DECL,
CC_OP_DECQ,
CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.msb = C */
CC_OP_SHLW,
CC_OP_SHLL,
CC_OP_SHLQ,
CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
CC_OP_SARW,
CC_OP_SARL,
CC_OP_SARQ,
CC_OP_NB,
};
typedef struct SegmentCache {
uint32_t selector;
target_ulong base;
uint32_t limit;
uint32_t flags;
} SegmentCache;
typedef union {
uint8_t _b[16];
uint16_t _w[8];
uint32_t _l[4];
uint64_t _q[2];
float32 _s[4];
float64 _d[2];
} XMMReg;
typedef union {
uint8_t _b[8];
uint16_t _w[4];
uint32_t _l[2];
float32 _s[2];
uint64_t q;
} MMXReg;
#ifdef HOST_WORDS_BIGENDIAN
#define XMM_B(n) _b[15 - (n)]
#define XMM_W(n) _w[7 - (n)]
#define XMM_L(n) _l[3 - (n)]
#define XMM_S(n) _s[3 - (n)]
#define XMM_Q(n) _q[1 - (n)]
#define XMM_D(n) _d[1 - (n)]
#define MMX_B(n) _b[7 - (n)]
#define MMX_W(n) _w[3 - (n)]
#define MMX_L(n) _l[1 - (n)]
#define MMX_S(n) _s[1 - (n)]
#else
#define XMM_B(n) _b[n]
#define XMM_W(n) _w[n]
#define XMM_L(n) _l[n]
#define XMM_S(n) _s[n]
#define XMM_Q(n) _q[n]
#define XMM_D(n) _d[n]
#define MMX_B(n) _b[n]
#define MMX_W(n) _w[n]
#define MMX_L(n) _l[n]
#define MMX_S(n) _s[n]
#endif
#define MMX_Q(n) q
typedef union {
floatx80 d __attribute__((aligned(16)));
MMXReg mmx;
} FPReg;
typedef struct {
uint64_t base;
uint64_t mask;
} MTRRVar;
#define CPU_NB_REGS64 16
#define CPU_NB_REGS32 8
#ifdef TARGET_X86_64
#define CPU_NB_REGS CPU_NB_REGS64
#else
#define CPU_NB_REGS CPU_NB_REGS32
#endif
#define NB_MMU_MODES 2
typedef enum TPRAccess {
TPR_ACCESS_READ,
TPR_ACCESS_WRITE,
} TPRAccess;
typedef struct CPUX86State {
/* standard registers */
target_ulong regs[CPU_NB_REGS];
target_ulong eip;
target_ulong eflags; /* eflags register. During CPU emulation, CC
flags and DF are set to zero because they are
stored elsewhere */
/* emulator internal eflags handling */
target_ulong cc_src;
target_ulong cc_dst;
uint32_t cc_op;
int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
uint32_t hflags; /* TB flags, see HF_xxx constants. These flags
are known at translation time. */
uint32_t hflags2; /* various other flags, see HF2_xxx constants. */
/* segments */
SegmentCache segs[6]; /* selector values */
SegmentCache ldt;
SegmentCache tr;
SegmentCache gdt; /* only base and limit are used */
SegmentCache idt; /* only base and limit are used */
target_ulong cr[5]; /* NOTE: cr1 is unused */
int32_t a20_mask;
/* FPU state */
unsigned int fpstt; /* top of stack index */
uint16_t fpus;
uint16_t fpuc;
uint8_t fptags[8]; /* 0 = valid, 1 = empty */
FPReg fpregs[8];
/* KVM-only so far */
uint16_t fpop;
uint64_t fpip;
uint64_t fpdp;
/* emulator internal variables */
float_status fp_status;
floatx80 ft0;
float_status mmx_status; /* for 3DNow! float ops */
float_status sse_status;
uint32_t mxcsr;
XMMReg xmm_regs[CPU_NB_REGS];
XMMReg xmm_t0;
MMXReg mmx_t0;
target_ulong cc_tmp; /* temporary for rcr/rcl */
/* sysenter registers */
uint32_t sysenter_cs;
target_ulong sysenter_esp;
target_ulong sysenter_eip;
uint64_t efer;
uint64_t star;
uint64_t vm_hsave;
uint64_t vm_vmcb;
uint64_t tsc_offset;
uint64_t intercept;
uint16_t intercept_cr_read;
uint16_t intercept_cr_write;
uint16_t intercept_dr_read;
uint16_t intercept_dr_write;
uint32_t intercept_exceptions;
uint8_t v_tpr;
#ifdef TARGET_X86_64
target_ulong lstar;
target_ulong cstar;
target_ulong fmask;
target_ulong kernelgsbase;
#endif
uint64_t system_time_msr;
uint64_t wall_clock_msr;
uint64_t async_pf_en_msr;
uint64_t tsc;
uint64_t tsc_deadline;
uint64_t mcg_status;
uint64_t msr_ia32_misc_enable;
/* exception/interrupt handling */
int error_code;
int exception_is_int;
target_ulong exception_next_eip;
target_ulong dr[8]; /* debug registers */
union {
CPUBreakpoint *cpu_breakpoint[4];
CPUWatchpoint *cpu_watchpoint[4];
}; /* break/watchpoints for dr[0..3] */
uint32_t smbase;
int old_exception; /* exception in flight */
/* KVM states, automatically cleared on reset */
uint8_t nmi_injected;
uint8_t nmi_pending;
CPU_COMMON
uint64_t pat;
/* processor features (e.g. for CPUID insn) */
uint32_t cpuid_level;
uint32_t cpuid_vendor1;
uint32_t cpuid_vendor2;
uint32_t cpuid_vendor3;
uint32_t cpuid_version;
uint32_t cpuid_features;
uint32_t cpuid_ext_features;
uint32_t cpuid_xlevel;
uint32_t cpuid_model[12];
uint32_t cpuid_ext2_features;
uint32_t cpuid_ext3_features;
uint32_t cpuid_apic_id;
int cpuid_vendor_override;
/* Store the results of Centaur's CPUID instructions */
uint32_t cpuid_xlevel2;
uint32_t cpuid_ext4_features;
/* Flags from CPUID[EAX=7,ECX=0].EBX */
uint32_t cpuid_7_0_ebx;
/* MTRRs */
uint64_t mtrr_fixed[11];
uint64_t mtrr_deftype;
MTRRVar mtrr_var[8];
/* For KVM */
uint32_t mp_state;
int32_t exception_injected;
int32_t interrupt_injected;
uint8_t soft_interrupt;
uint8_t has_error_code;
uint32_t sipi_vector;
uint32_t cpuid_kvm_features;
uint32_t cpuid_svm_features;
bool tsc_valid;
int tsc_khz;
void *kvm_xsave_buf;
/* in order to simplify APIC support, we leave this pointer to the
user */
struct DeviceState *apic_state;
uint64_t mcg_cap;
uint64_t mcg_ctl;
uint64_t mce_banks[MCE_BANKS_DEF*4];
uint64_t tsc_aux;
/* vmstate */
uint16_t fpus_vmstate;
uint16_t fptag_vmstate;
uint16_t fpregs_format_vmstate;
uint64_t xstate_bv;
XMMReg ymmh_regs[CPU_NB_REGS];
uint64_t xcr0;
TPRAccess tpr_access_type;
} CPUX86State;
#include "cpu-qom.h"
CPUX86State *cpu_x86_init(const char *cpu_model);
int cpu_x86_exec(CPUX86State *s);
void x86_cpu_list (FILE *f, fprintf_function cpu_fprintf, const char *optarg);
void x86_cpudef_setup(void);
int cpu_x86_support_mca_broadcast(CPUX86State *env);
int cpu_get_pic_interrupt(CPUX86State *s);
/* MSDOS compatibility mode FPU exception support */
void cpu_set_ferr(CPUX86State *s);
/* this function must always be used to load data in the segment
cache: it synchronizes the hflags with the segment cache values */
static inline void cpu_x86_load_seg_cache(CPUX86State *env,
int seg_reg, unsigned int selector,
target_ulong base,
unsigned int limit,
unsigned int flags)
{
SegmentCache *sc;
unsigned int new_hflags;
sc = &env->segs[seg_reg];
sc->selector = selector;
sc->base = base;
sc->limit = limit;
sc->flags = flags;
/* update the hidden flags */
{
if (seg_reg == R_CS) {
#ifdef TARGET_X86_64
if ((env->hflags & HF_LMA_MASK) && (flags & DESC_L_MASK)) {
/* long mode */
env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
env->hflags &= ~(HF_ADDSEG_MASK);
} else
#endif
{
/* legacy / compatibility case */
new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
>> (DESC_B_SHIFT - HF_CS32_SHIFT);
env->hflags = (env->hflags & ~(HF_CS32_MASK | HF_CS64_MASK)) |
new_hflags;
}
}
new_hflags = (env->segs[R_SS].flags & DESC_B_MASK)
>> (DESC_B_SHIFT - HF_SS32_SHIFT);
if (env->hflags & HF_CS64_MASK) {
/* zero base assumed for DS, ES and SS in long mode */
} else if (!(env->cr[0] & CR0_PE_MASK) ||
(env->eflags & VM_MASK) ||
!(env->hflags & HF_CS32_MASK)) {
/* XXX: try to avoid this test. The problem comes from the
fact that is real mode or vm86 mode we only modify the
'base' and 'selector' fields of the segment cache to go
faster. A solution may be to force addseg to one in
translate-i386.c. */
new_hflags |= HF_ADDSEG_MASK;
} else {
new_hflags |= ((env->segs[R_DS].base |
env->segs[R_ES].base |
env->segs[R_SS].base) != 0) <<
HF_ADDSEG_SHIFT;
}
env->hflags = (env->hflags &
~(HF_SS32_MASK | HF_ADDSEG_MASK)) | new_hflags;
}
}
static inline void cpu_x86_load_seg_cache_sipi(CPUX86State *env,
int sipi_vector)
{
env->eip = 0;
cpu_x86_load_seg_cache(env, R_CS, sipi_vector << 8,
sipi_vector << 12,
env->segs[R_CS].limit,
env->segs[R_CS].flags);
env->halted = 0;
}
int cpu_x86_get_descr_debug(CPUX86State *env, unsigned int selector,
target_ulong *base, unsigned int *limit,
unsigned int *flags);
/* wrapper, just in case memory mappings must be changed */
static inline void cpu_x86_set_cpl(CPUX86State *s, int cpl)
{
#if HF_CPL_MASK == 3
s->hflags = (s->hflags & ~HF_CPL_MASK) | cpl;
#else
#error HF_CPL_MASK is hardcoded
#endif
}
/* op_helper.c */
/* used for debug or cpu save/restore */
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, floatx80 f);
floatx80 cpu_set_fp80(uint64_t mant, uint16_t upper);
/* cpu-exec.c */
/* the following helpers are only usable in user mode simulation as
they can trigger unexpected exceptions */
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32);
void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32);
/* you can call this signal handler from your SIGBUS and SIGSEGV
signal handlers to inform the virtual CPU of exceptions. non zero
is returned if the signal was handled by the virtual CPU. */
int cpu_x86_signal_handler(int host_signum, void *pinfo,
void *puc);
/* cpuid.c */
void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
uint32_t *eax, uint32_t *ebx,
uint32_t *ecx, uint32_t *edx);
int cpu_x86_register(X86CPU *cpu, const char *cpu_model);
void cpu_clear_apic_feature(CPUX86State *env);
void host_cpuid(uint32_t function, uint32_t count,
uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
/* helper.c */
int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
int is_write, int mmu_idx);
#define cpu_handle_mmu_fault cpu_x86_handle_mmu_fault
void cpu_x86_set_a20(CPUX86State *env, int a20_state);
static inline int hw_breakpoint_enabled(unsigned long dr7, int index)
{
return (dr7 >> (index * 2)) & 3;
}
static inline int hw_breakpoint_type(unsigned long dr7, int index)
{
return (dr7 >> (DR7_TYPE_SHIFT + (index * 4))) & 3;
}
static inline int hw_breakpoint_len(unsigned long dr7, int index)
{
int len = ((dr7 >> (DR7_LEN_SHIFT + (index * 4))) & 3);
return (len == 2) ? 8 : len + 1;
}
void hw_breakpoint_insert(CPUX86State *env, int index);
void hw_breakpoint_remove(CPUX86State *env, int index);
int check_hw_breakpoints(CPUX86State *env, int force_dr6_update);
/* will be suppressed */
void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
void cpu_x86_update_cr3(CPUX86State *env, target_ulong new_cr3);
void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4);
/* hw/pc.c */
void cpu_smm_update(CPUX86State *env);
uint64_t cpu_get_tsc(CPUX86State *env);
/* used to debug */
#define X86_DUMP_FPU 0x0001 /* dump FPU state too */
#define X86_DUMP_CCOP 0x0002 /* dump qemu flag cache */
#define TARGET_PAGE_BITS 12
#ifdef TARGET_X86_64
#define TARGET_PHYS_ADDR_SPACE_BITS 52
/* ??? This is really 48 bits, sign-extended, but the only thing
accessible to userland with bit 48 set is the VSYSCALL, and that
is handled via other mechanisms. */
#define TARGET_VIRT_ADDR_SPACE_BITS 47
#else
#define TARGET_PHYS_ADDR_SPACE_BITS 36
#define TARGET_VIRT_ADDR_SPACE_BITS 32
#endif
#define cpu_init cpu_x86_init
#define cpu_exec cpu_x86_exec
#define cpu_gen_code cpu_x86_gen_code
#define cpu_signal_handler cpu_x86_signal_handler
#define cpu_list_id x86_cpu_list
#define cpudef_setup x86_cpudef_setup
#define CPU_SAVE_VERSION 12
/* MMU modes definitions */
#define MMU_MODE0_SUFFIX _kernel
#define MMU_MODE1_SUFFIX _user
#define MMU_USER_IDX 1
static inline int cpu_mmu_index (CPUX86State *env)
{
return (env->hflags & HF_CPL_MASK) == 3 ? 1 : 0;
}
#undef EAX
#define EAX (env->regs[R_EAX])
#undef ECX
#define ECX (env->regs[R_ECX])
#undef EDX
#define EDX (env->regs[R_EDX])
#undef EBX
#define EBX (env->regs[R_EBX])
#undef ESP
#define ESP (env->regs[R_ESP])
#undef EBP
#define EBP (env->regs[R_EBP])
#undef ESI
#define ESI (env->regs[R_ESI])
#undef EDI
#define EDI (env->regs[R_EDI])
#undef EIP
#define EIP (env->eip)
#define DF (env->df)
#define CC_SRC (env->cc_src)
#define CC_DST (env->cc_dst)
#define CC_OP (env->cc_op)
/* float macros */
#define FT0 (env->ft0)
#define ST0 (env->fpregs[env->fpstt].d)
#define ST(n) (env->fpregs[(env->fpstt + (n)) & 7].d)
#define ST1 ST(1)
/* translate.c */
void optimize_flags_init(void);
#if defined(CONFIG_USER_ONLY)
static inline void cpu_clone_regs(CPUX86State *env, target_ulong newsp)
{
if (newsp)
env->regs[R_ESP] = newsp;
env->regs[R_EAX] = 0;
}
#endif
#include "cpu-all.h"
#include "svm.h"
#if !defined(CONFIG_USER_ONLY)
#include "hw/apic.h"
#endif
static inline bool cpu_has_work(CPUX86State *env)
{
return ((env->interrupt_request & CPU_INTERRUPT_HARD) &&
(env->eflags & IF_MASK)) ||
(env->interrupt_request & (CPU_INTERRUPT_NMI |
CPU_INTERRUPT_INIT |
CPU_INTERRUPT_SIPI |
CPU_INTERRUPT_MCE));
}
#include "exec-all.h"
static inline void cpu_pc_from_tb(CPUX86State *env, TranslationBlock *tb)
{
env->eip = tb->pc - tb->cs_base;
}
static inline void cpu_get_tb_cpu_state(CPUX86State *env, target_ulong *pc,
target_ulong *cs_base, int *flags)
{
*cs_base = env->segs[R_CS].base;
*pc = *cs_base + env->eip;
*flags = env->hflags |
(env->eflags & (IOPL_MASK | TF_MASK | RF_MASK | VM_MASK));
}
void do_cpu_init(CPUX86State *env);
void do_cpu_sipi(CPUX86State *env);
#define MCE_INJECT_BROADCAST 1
#define MCE_INJECT_UNCOND_AO 2
void cpu_x86_inject_mce(Monitor *mon, CPUX86State *cenv, int bank,
uint64_t status, uint64_t mcg_status, uint64_t addr,
uint64_t misc, int flags);
/* op_helper.c */
void do_interrupt(CPUX86State *env);
void do_interrupt_x86_hardirq(CPUX86State *env, int intno, int is_hw);
void QEMU_NORETURN raise_exception_env(int exception_index, CPUX86State *nenv);
void QEMU_NORETURN raise_exception_err_env(CPUX86State *nenv, int exception_index,
int error_code);
void do_smm_enter(CPUX86State *env1);
void svm_check_intercept(CPUX86State *env1, uint32_t type);
uint32_t cpu_cc_compute_all(CPUX86State *env1, int op);
void cpu_report_tpr_access(CPUX86State *env, TPRAccess access);
#endif /* CPU_I386_H */
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